Boo comic's introduction, bad act - everything (7), 7 letters
Boo! from the stands, e.g., 7 letters
Sound of disapproval, 7 letters
Whistle while you work?, 7 letters
A cry expressing disapproval, 7 letters
Alternative to booing or hissing, 10 letters
Bleacher bum harassment, 8 letters
Expressions of disapproval, 8 letters
Not flattering whistles, 8 letters
Sounds of disapproval, 8 letters